Seven-transmembrane-helix receptors

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What essential feature is carried out by the seven-transmembrane-helix receptors (7TM)? (we commonly referred to these at G protein-coupled). Which nucleotides are bound to G proteins in their unactivated state and activated state, respectively? How does the 7TM (receptor) activated a G protein? How is the activated state of a G protein returned to the unactivated form?

Reference no: EM132439837

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